Thanks for the link and gratz for a solid run!
Why 3x Faerie Macabre? The entire deck is made to crush combo, you even play 2 Priests maindeck (and the common RiP at Side), i don't see that you must overload with Graveyard Hate, since Priest + RiP can be played Turn 1 and you have still stuff like Chalice, Thalia etc.
Gratz at the winner.
Sadly i don't like the list and can't imagine it runs smoothly. I am still not convinced that Petal is the deal over Mox if you play so many White Cards (it was different with Eldrazi builds, you only needed White for Displacer) Especially if you play the full playset Smasher and also high cc cards like kavu that needs a color. Throwing away a Petal to play a sword also feels not right. It also seems risky to run a deck without Disenchant effect, i can't imagine to win vs Miracle and cards like Blood Moon, Moat, Back to Basics, Ensnaring Bridge etc. The advantage over Eldrazi (and the reason to play this build) should always be, that you have better matchups (and cards) than colorless Eldrazi. If you aren't superior in this way, there is no reason (besides personal preferences) to play a weaker "Stompy" Shell - that is why Eldrazi suppressed most other Stompy decks, simply because it do the job pretty well.
If you like the Red Splash: I would still cut every Kavu for Palace Jailer, since Jailer is a human (great bonus point) and will also kill creatures that Kavu can't harm (keep in mind that a Gofy is still a wall to Thalia(s), TKS etc.).
With red (and the right lands) i would try 1-2
Nahiri, the Harbinger at main, you can cycle useless Thalia+Mox+Chalice copies, kill stuff with support of Thalia 2.0 and Displacer (or tapped attackers from last turn) and simply gain advantage over the turns. For Sideboard you can try
Wear // Tear over Disenchant and i would also try 1-2 copies of
Pia and Kiran Nalaar against Miracle/Control/Moon.dec.
That 3 cards should be the reason to play red (and cripple the manabase with non basics) not a Kavu...
Note: Personal record with my White Build yesterday:
2:0 Miracle (Legends build)
2:0 Miracle
2:0 UR Delver
1:2 OmniSneak (some really bad hands/draws involved)
2:1 DnT